CN110071364A - A kind of two-band frequency scan antenna - Google Patents

A kind of two-band frequency scan antenna Download PDF

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Publication number
CN110071364A
CN110071364A CN201910305168.6A CN201910305168A CN110071364A CN 110071364 A CN110071364 A CN 110071364A CN 201910305168 A CN201910305168 A CN 201910305168A CN 110071364 A CN110071364 A CN 110071364A
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China
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medium substrate
metal
band
center line
groove
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CN201910305168.6A
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CN110071364B (en
Inventor
吴边
祖浩然
赵雨桐
苏涛
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Xidian Univ
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Xidian Univ
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00Auxiliary devices
    • H01P1/16Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/36Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/36Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/48Earthing means; Earth screens; Counterpoises
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/50Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30Arrangements for providing operation on different wavebands

Abstract

The invention discloses a kind of two-band frequency scan antennas, including medium substrate, two feed structures, two mode transition structures and irradiation structure, one feed structure, a mode transition structure, irradiation structure, another feed structure and another mode transition structure is set in turn on medium substrate and mutual electrical communication, first center line symmetrical setting of two mode transition structures along medium substrate, first center line symmetrical setting of two feed structures along medium substrate.Two-band frequency scan antenna proposed by the invention can generate high frequency radiation and low frequency radiation simultaneously, two working frequency range can be provided for antenna, and large-scale beam scanning can be independently realized in two working frequency range, two-band frequency scan antenna proposed by the invention simultaneously uses plane form, it ensure that the low section of antenna entirety, the overall volume of antenna is smaller, and weight is lighter, and it is of simple structure and low cost, it has broad application prospects.

Description

A kind of two-band frequency scan antenna
Technical field
The invention belongs to antenna technical fields, and in particular to a kind of two-band frequency scan antenna.
Background technique
So that the requirement to antenna becomes higher and higher, a large amount of scene needs antenna can for the rapid development of the communication technology Realize beam scanning function.The beam scanning of antenna has mechanical scanning and automatically controlled scanning two ways, and traditional mechanical scanning Antenna is much unable to satisfy the demand of the wireless communication fields such as radar detection and satellite communication because speed is slow, structure is complicated. And automatically controlled scanning antenna because of beam position flexibly, rapidly, data transfer rate is high, the beam scanning time is short, and identification can be achieved at the same time, search The multiple functions such as rope, tracking, passive detection and guidance have obtained more and more applications.
As one kind of automatically controlled scanning antenna, frequency scan antenna have high gain, Sidelobe, large-angle scanning, it is at low cost, Advantages of simple structure and simple.It is widely used in the fields such as low altitude coverage radar, Search Radar, satellite communication in recent years.It is existing Some frequency scan antennas are broadly divided into two kinds of forms of leaky-wave antenna and Frequency scanning arrays antenna.Leaky-wave antenna is mainly with wave The form of guiding clearance seam realizes that structure is simple, high-efficient, but volume is larger, and requirement on machining accuracy is higher, and scanning angle It is restricted, usually cannot achieve wide-angle scanning.Frequency scanning arrays antenna then can be realized biggish beam scanning, and obtain To extensive use.
But the size of Frequency scanning arrays antenna is larger at present, and can only realize that one-segment works.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the present invention provides a kind of two-band frequency scan antennas. The technical problem to be solved in the present invention is achieved through the following technical solutions:
A kind of two-band frequency scan antenna, comprising: medium substrate, two feed structures, two mode transition structures and Irradiation structure, wherein
One feed structure, a mode transition structure, the irradiation structure, another described feed structure It is set in turn on the medium substrate with mode transition structure described in another and mutual electrical communication, two modes Transformational structure along the medium substrate the first center line symmetrical setting, two feed structures along the medium substrate One center line symmetrical setting.
In one embodiment of the invention, if the irradiation structure includes phasmon transmission line and dry plate radiation patch Piece, if radiation patch described in the phasmon transmission line and dry plate is all set on the medium substrate, wherein
The center line of the phasmon transmission line is overlapped with the second center line of the medium substrate, the phasmon The both ends of transmission line are connected to two mode transition structures, the radiation patch of 1/2 quantity and remaining 1/2 quantity The radiation patch be respectively arranged at the medium substrate the second center line two sides, and each radiation patch with etc. From the gap for being provided with the first pre-determined distance between excimer transmission line, positioned at the two neighboring radiation patch center in the same side Distance is the second pre-determined distance, in the two neighboring radiation patch of the second center line two sides of the medium substrate The horizontal distance of the heart is the second pre-determined distance.
In one embodiment of the invention, the radiation patch is round, ellipse, rectangular or square.
In one embodiment of the invention, the phasmon transmission line includes the first metal band, described being located at One the first groove is set every third pre-determined distance on first metal band of second center line side of medium substrate, Every third pre-determined distance on first metal band of the other side for the second center line for being located at the medium substrate Be arranged first groove, all first grooves it is equal in magnitude, and be located at the medium substrate the second center line two The horizontal distance of two neighboring first groove center of side is third pre-determined distance.
In one embodiment of the invention, the width of first metal band is greater than the depth of first groove 2 times.
In one embodiment of the invention, the mode transition structure includes two curved metal floors and graded metal Conduction band, two curved metal floors and the graded metal conduction band are all set on the medium substrate, wherein
The first end of the graded metal conduction band is connected to the feed structure, and the second end of the graded metal conduction band connects It is connected to the phasmon transmission line, the center line of the graded metal conduction band and the second center line weight of the medium substrate Close, two curved metal floors along the medium substrate the second center line symmetrical setting, the curved metal floor First end to second end of the width along the curved metal floor is gradually decrease to zero.
In one embodiment of the invention, the graded metal conduction band includes the second metal band, is being located at Jie One the second groove is set every third pre-determined distance on second metal band of second center line side of matter substrate, It is also set on second metal band of the other side of the second center line of the medium substrate every third pre-determined distance Second groove is set, and be located at two neighboring second groove center of the second center line two sides of the medium substrate Horizontal distance is third pre-determined distance, the depth of second groove along second metal band second end to first end by It is cumulative big, until the depth of second groove is equal to the depth of first groove.
In one embodiment of the invention, the feed structure include two metal floors and central metal conduction band, two A metal floor and the central metal conduction band are all set on the medium substrate, wherein
The central metal conduction band is connected to the second end of the graded metal conduction band, the center of the central metal conduction band Line is overlapped with the second center line of the medium substrate, second center line pair of two metal floors along the medium substrate Claim setting, each metal floor and central metal conduction band are provided with the gap of the 4th pre-determined distance.
In one embodiment of the invention, the equal length of the metal floor and the central metal conduction band.
Beneficial effects of the present invention:
Two-band frequency scan antenna proposed by the invention can generate high frequency radiation and low frequency radiation, Neng Gouwei simultaneously Antenna provides two working frequency range, and large-scale beam scanning can be independently realized in two working frequency range, simultaneously Two-band frequency scan antenna proposed by the invention uses plane form, ensure that the low section of antenna entirety, antenna it is whole Body volume is smaller, and weight is lighter, and of simple structure and low cost, has broad application prospects.
The present invention is described in further details below with reference to accompanying drawings and embodiments.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of two-band frequency scan antenna provided in an embodiment of the present invention;
Fig. 2 is a kind of structural schematic diagram of irradiation structure provided in an embodiment of the present invention;
Fig. 3 is the structural representation of a kind of feed structure and mode transition structure connected to it provided in an embodiment of the present invention Figure;
Fig. 4 is a kind of result figure of emulation 1 provided in an embodiment of the present invention;
Fig. 5 a and Fig. 5 b are a kind of result figures of emulation 2 provided in an embodiment of the present invention.
Specific embodiment
Further detailed description is done to the present invention combined with specific embodiments below, but embodiments of the present invention are not limited to This.
Embodiment one
Referring to Figure 1, Fig. 1 is a kind of structural schematic diagram of two-band frequency scan antenna provided in an embodiment of the present invention, The present embodiment provides a kind of two-band frequency scan antenna, which includes: medium substrate 1, two feedback 2, two mode transition structures 3 of electric structure and irradiation structure 4, wherein
One feed structure, 2, mode transition structures 3, the irradiation structure 4, another described feed Structure 2 and another described mode transition structure 3 are set in turn on the medium substrate 1 and mutual electrical communication, two institutes The first center line 11 that mode transition structure 3 is stated along the medium substrate 1 is symmetrical arranged, and two feed structures 2 are along described First center line 11 of medium substrate 1 is symmetrical arranged.
Wherein, feed structure 2, mode transition structure 3, irradiation structure 4 are conductor, such as are metal.
Feed structure 2, mode transition structure 3, irradiation structure 4 are all set on medium substrate 1 by the present embodiment, along described First center line 11 of medium substrate 1 is symmetrically arranged with feed structure 2 and mode transition structure 3, and irradiation structure 4 is set to The center of medium substrate 1 ensure that the low section of two-band frequency scan antenna to constitute a structure entirety Property, the volume of two-band frequency scan antenna is greatly reduced, and the conversion of transmission mode is completed by mode transition structure 3, Be more good impedance matching is realized, to improve the efficiency of transmission of electromagnetic wave, while the irradiation structure 4 of the present embodiment can produce Raw high frequency radiation and low frequency radiation, to realize two working frequency range of antenna.
The present embodiment is to be fed by way of co-planar waveguide to antenna, through mode transition structure drive surface etc. from Excimer transmission mode, in electromagnetic wave conductive process, by the phasmon transmission line of plane artificial surface by lower frequency It is radiated on couple electromagnetic energy to radiation patch, and the electromagnetic energy of upper frequency is directly given off in transmission process It goes.The planarization design of antenna is realized, and solves the problems, such as that existing frequency scan antenna can only operate in single frequency band.
In the present embodiment, can excitation port by one of feed structure 2 as antenna, swash to connect radio frequency Signal is encouraged, which is the feed structure 2 positioned at 11 left side of the first center line of medium substrate 1, positioned at medium substrate 1 2 matching connection of feed structure on 11 right side of the first center line loads, and to guarantee the traveling-wave mode of antenna, is.
In one embodiment, Fig. 2 is referred to, if the irradiation structure 4 includes phasmon transmission line 41 and dry plate spoke Patch 42 is penetrated, if radiation patch 42 described in the phasmon transmission line 41 and dry plate is all set on the medium substrate 1, In,
The center line of the phasmon transmission line 41 is overlapped with the second center line 12 of the medium substrate 1, described etc. Both ends from excimer transmission line 41 be connected to the radiation patch 42 of two 3,1/2 quantity of mode transition structure with The radiation patch 42 of remaining 1/2 quantity is respectively arranged at the two sides of the second center line 12 of the medium substrate 1, and each The gap of the first pre-determined distance is provided between the radiation patch 42 and phasmon transmission line 41, and (the first pre-determined distance is denoted as S2), the distance positioned at two neighboring 42 center of radiation patch in the same side is the second pre-determined distance, is located at the medium base The horizontal distance at two neighboring 42 center of radiation patch of 12 two sides of the second center line of plate 1 is the second pre-determined distance.
Wherein, the second center line 12 of the first center line 11 of medium substrate 1 and medium substrate 1 is respectively medium substrate 1 Vertical centerline and horizontal center line, i.e. the first center line 11 of medium substrate 1 and the second center line 12 be mutually perpendicular to.
For example, medium substrate 1 can use permittivity εr=3.5 F4B (polytetrafluoroethylene (PTFE) substrate) material, medium base Length L=380mm, width W=88mm, the thickness t=0.8mm of plate 1.
The present embodiment is respectively provided with same amount of radiation patch in the two sides of the second center line 12 of medium substrate 1 42, and will be located at medium substrate 1 the second center line 12 the same side radiation patch 42 apart from phasmon transmission line 41 away from From all the same, it is denoted as S2, distance S2 is coupling distance, and is located at the radiation patch of 12 the same side of the second center line of medium substrate 1 42 spaced set of piece, and will be located between the two neighboring radiation patch 42 of 12 the same side of the second center line of medium substrate 1 Distance is denoted as the second pre-determined distance (the second pre-determined distance is denoted as d), while 12 liang of the second center line that will be located at medium substrate 1 The radiation patch 42 of side mutually staggers setting, i.e., will be located at the two neighboring radiation of 12 two sides of the second center line of medium substrate 1 The horizontal distance at 42 center of patch is also the second pre-determined distance.
Preferably, radiation patch 42 is round, ellipse, rectangular or square.It will be appreciated that, the present embodiment radiation patch The shape of piece 42 is not limited to above-mentioned several shapes, and those skilled in the art can be according to actual needs by the shape of radiation patch 42 Shape is designed to other forms.
The phasmon transmission line 41 of the plane artificial surface can generate high frequency radiation and low frequency radiation, be located at medium The radiation patch 42 of 12 two sides of the second center line of substrate 1 can be fed by way of coupling and generate low frequency radiation. Therefore, irradiation structure 4 can provide two working frequency range for antenna.
Further, the phasmon transmission line 41 includes the first metal band 411, is being located at the medium substrate 1 12 side of the second center line first metal band 411 on every third pre-determined distance be arranged first groove 412, It is default every third on first metal band 411 of the other side for the second center line 12 for being located at the medium substrate 1 Distance is also provided with first groove 412, all first grooves 412 it is equal in magnitude, and be located at the medium substrate 1 The horizontal distance at two neighboring first groove, 412 center of 12 two sides of the second center line is third pre-determined distance, by third Pre-determined distance is denoted as P/2, and a P is denoted as a structural unit.
First metal band 411 of the present embodiment is strip and equivalent width, and is being located at Jie every third pre-determined distance First that width is third pre-determined distance is alternately opened up on first metal band 411 of 12 two sides of the second center line of matter substrate 1 Groove 412, and the size of each first groove 412 is equal, the first metal band between two neighboring first groove 412 411 width is also P/2, while the width (W2) of the first metal band 411 is greater than 2 times of the depth (h) of the first groove 412, The present embodiment can generate high frequency radiation and low frequency radiation by the phasmon transmission line 41 of this structure, and be located at and wait from sharp The radiation patch 42 of first 41 two sides of transmission line is fed by way of coupling and generates low frequency radiation.
In one embodiment, Fig. 3 is referred to, the mode transition structure 3 is including two curved metal floors 31 and gradually Become metal conduction band 32, two curved metal floors 31 and the graded metal conduction band 32 are all set in the medium substrate 1 On, wherein
The first end of the graded metal conduction band 32 is connected to the feed structure 2, and the of the graded metal conduction band 32 Two ends are connected to the phasmon transmission line 41, and the of the center line of the graded metal conduction band 32 and the medium substrate 1 Two center lines 12 are overlapped, and two curved metal floors 31 are symmetrical arranged along the second center line 12 of the medium substrate 1, institute It states first end to second end of the width on curved metal floor 31 along the curved metal floor 31 and is gradually decrease to zero.
The curved metal floor 31 of the present embodiment is circular shape, the hanging down from first end to second end of curved metal floor 31 Straight distance is denoted as L2, and the arc sideline on curved metal floor 31 is extremely located at the side of the medium substrate 1 of the same side with it Distance is denoted as the width b1 on curved metal floor 31, and the first end on curved metal floor 31 is that of close feed structure 2 End, the second end on curved metal floor 31 is that one end of close irradiation structure 4, and the width b1 on curved metal floor 31 is along arc The first end of shape metal floor 31 to second end is gradually decrease to zero.
Further, the graded metal conduction band 32 includes the second metal band 321, is being located at the medium substrate 1 One the second groove 322 is set every third pre-determined distance on second metal band 321 of second center line, 12 side, On second metal band 321 of the other side of the second center line 12 of the medium substrate 1 every third it is default away from From being also provided with second groove 322, and be located at the medium substrate 1 12 two sides of the second center line two neighboring described the The horizontal distance at two grooves, 322 center is third pre-determined distance, and the depth of second groove 322 is along second metal band 321 second end to first end is gradually increased, until the depth of second groove 322 is equal to the depth of first groove 412 Degree.
The first end of second metal band 321 of the present embodiment is connected to the first metal band 411, the second metal band 321 second end is connected to feed structure 2, and the second metal band 321 be strip and width by second end to first end gradually It broadens, up to equal with the width of the first metal band 411, and is being located at the second of medium substrate 1 every third pre-determined distance The second groove 322 alternately is opened up on second metal band 321 of 12 two sides of center line, the depth of the second groove 322 is along the second gold medal Second end to the first end for belonging to band 321 is gradually increased, until the depth of the second groove 322 is equal to the depth of the first groove 412, When the depth of the second groove 322 is equal to the depth of the first groove 412, by the first end of the second metal band 321 and the first gold medal Belonging to band 411 to be connected, wherein the width of the second metal band 321 between two neighboring second groove 322 is also P/2, the The bottom of the bottom of two grooves 322 and the first groove 412 remains in the same horizontal line, and all second grooves 322 Width (p/2) is equal, and the width of the second groove 322 is equal to the width of the first groove 412.The present embodiment passes through the second groove The 31 compositional model transformational structure of the second metal band 321 and curved metal floor with arcuate shape of 322 depth gradual change 3, the conversion of transmission mode can not only be completed, additionally it is possible to good impedance matching is realized, to improve the transmission effect of electromagnetic wave Rate.
In one embodiment, referring again to Fig. 3, the feed structure 2 includes two metal floors 21 and center gold Belong to conduction band 22, two metal floors 21 and the central metal conduction band 22 are all set on the medium substrate 1, wherein
The central metal conduction band 22 is connected to the second end of the graded metal conduction band 32, the central metal conduction band 22 Center line be overlapped with the second center line 12 of the medium substrate 1, two metal floors 21 are along the medium substrate 1 Second center line 12 is symmetrical arranged, and each metal floor 21 is provided with the 4th pre-determined distance with central metal conduction band 22 Gap.
The feed structure 2 of the present embodiment by be located at medium substrate 1 12 two sides of the second center line metal floor 21 and Central metal conduction band 22 forms, and central metal conduction band 22 is strip, 12 weight of the second center line of center line and medium substrate 1 It closes, the length of metal floor 21 is denoted as L1, width is denoted as b, the length of central metal conduction band 22 is also that L1, width are denoted as w1, There is the 4th pre-determined distance in metal floor 21 and central metal conduction band 22 positioned at 12 two sides of the second center line of medium substrate 1 Gap, the 4th pre-determined distance is denoted as S1.The one of feed structure 2 of the present embodiment can be used as the excitation port of antenna, To connect rf excitation signal, another 2 matching connection of feed structure load, to guarantee the traveling-wave mode of antenna.
Further, the equal length of the metal floor 21 and the central metal conduction band 22, is L1.
The two-band frequency scan antenna for the plane artificial surface phasmon structure that the present embodiment uses can be simultaneously High frequency radiation and low frequency radiation are generated, radiation patch is cooperated, two working frequency range can be provided for antenna, and work at two Large-scale beam scanning can be independently realized in frequency range, solve that existing frequency scan antenna working frequency range is single to ask Topic.
Feed structure, mode transition structure and the irradiation structure of the two-band frequency scan antenna of the present embodiment are all made of flat Face form ensure that the low section of two-band frequency scan antenna entirety, compared with prior art, two-band frequency scan antenna Overall volume it is smaller, weight is lighter, and simple in structure and low in cost, has broad application prospects.
To sum up, the two-band frequency scan antenna for the plane artificial surface that the present embodiment is proposed solves legacy frequencies The problem of scanning antenna working frequency range is single, can only carry out single beam scanning, and it is small in size, and section is low, is conducive to plane Integration Design.
Embodiment two
It is a kind of structural representation of two-band frequency scan antenna provided in an embodiment of the present invention referring again to Fig. 1, Fig. 1 Figure, the embodiment of the present invention on the basis of the above embodiments, provide a kind of two-band frequency scan antenna with design parameter. Specifically,
Medium substrate 1 can use permittivity εr=3.5 F4B (polytetrafluoroethylene (PTFE) substrate) material, medium substrate 1 Length L=380mm, width W=88mm, thickness t=0.8mm.
Referring again to Fig. 3, feed structure 2 includes the metal floor positioned at 12 two sides of the second center line of medium substrate 1 21 and central metal conduction band 22.Metal floor 21 positioned at 12 two sides of the second center line of medium substrate 1 is about medium substrate 1 The second center line 12 it is symmetrical, and there are the gap of identical 4th pre-determined distance size, the 4th pre-determined distance S1= 0.2mm, width b=43.8mm, the length L1=5mm of each metal floor 21, the width w1=1mm of central metal conduction band 22, Length L1=5mm.
It includes the curved metal floor 31 for being located at 12 two sides of the second center line of medium substrate 1 that mode transition structure 3, which is located at, And the graded metal conduction band 32 among two curved metal floors 31, positioned at 12 liang of the second center line of medium substrate 1 The metal floor 31 of side is symmetrical about intermediate graded metal conduction band 32.The 31 length L2=of curved metal floor of every side 77.5mm, width are gradually reduced with the increase of length, and specific width is b1=43.8-43.8* (L2/77.5) 2.Gradual change gold Belong to the length L2=77.5mm of conduction band 32, the first end of the width b1 on curved metal floor 31 arcuately metal floor 31 is to second End is gradually decrease to zero, and the set-up mode of the width on curved metal floor 31 is w0=1+5* (L2/77.5), the L2 in the formula Value range be from 0 to L2, i.e., be gradually increased to second end from the first end on curved metal floor 31.Graded metal conduction band 32 On every p/2 alternately open up the second groove 322 in about 321 two sides of the second metal band, and the bottom of the second groove 322 and the The bottom of one groove 412 is kept in the same horizontal line, and the width of the second groove 322 is p/2, and formation length is p=10mm's Structural unit.The second metal band 321 and curved metal floor 31 by the depth gradual change of the second groove 322, can be realized Good impedance matching.
Referring again to Fig. 2, irradiation structure 4 includes the phasmon transmission line 41 and six of a plane artificial surface A radiation patch 42.Wherein, 4 entire length L3=215mm of irradiation structure, phasmon transmission line 41 are by width w2 Alternately opening width in about 12 two sides of the second center line of medium substrate 1 every p/2 on the first metal band 411 of=6mm is p/ The first groove 412 of 2, deep h=2.5mm, formation length are the structural unit of p=10mm.Six circular radiation patches 42 are distributed It in about 41 two sides of phasmon transmission line, is alternately distributed every d=20mm, the radius r=20mm of circular radiation patch 42, with Coupling distance between phasmon transmission line 41 is S2=0.5mm.The phasmon transmission line 41 can generate high frequency radiation With low frequency radiation, six radiation patch 42 can be fed by way of coupling and generate low frequency radiation.Therefore, radiation knot Structure 4 can provide two working frequency range for antenna.
Two-band frequency scan antenna provided in an embodiment of the present invention, implementing principle and technical effect and one institute of embodiment The content of record is identical, and details are not described herein.
Fig. 4 is referred to, for emulation 1, the two-band frequency scan antenna in the present embodiment two imitates parameter S Very, the abscissa in Fig. 4 is frequency, and unit GHz, range is from 0GHz to 30GHz, and ordinate is the decibel of S parameter amplitude Value, unit dB, range are -45dB -0dB.S11 represents the reflection coefficient of feed structure 2.As shown in Figure 4, in 2.8- In 7.3GHz and 13.7-27.4GHz band limits, S11 is respectively less than -10dB, this illustrates that the matching of feed structure 2 is preferable, antenna Good work can be carried out in above-mentioned two frequency range.
Fig. 5 a and Fig. 5 b is referred to, for emulation 2, to the two-band frequency scan antenna in the embodiment of the present invention two Directional diagram emulated.Fig. 5 a is directional diagram of the antenna in 3GHz, 4GHz, 5GHz, 6GHz and 7GHz, it can be seen that with The beam position of the variation of frequency, antenna deflects to 43.1 ° from -21.5 °, realizes 64.6 ° of wave beam deflection angle, and gain Variation range is 8.02-10.23dBi, shows that antenna has stable gain in low frequency operation frequency range.Fig. 5 b is that antenna exists Directional diagram when 14GHz, 18GHz, 22GHz, 25GHz and 27GHz, it can be seen that with the variation of frequency, the wave beam of antenna refers to To deflecting to 22.5 ° from -47.3 °, 69.8 ° of beam scanning range can be covered, gain variation range 8.61-9.69dBi, Show that antenna equally has stable gain in high-frequency work frequency range.Therefore, which can be in 2.8-7.3GHz and 13.7- In two band limits of 27.4GHz, independent a wide range of beam scanning is provided.
To sum up, the two-band frequency scan antenna for the plane artificial surface that the present embodiment is proposed solves legacy frequencies The problem of scanning antenna working frequency range is single, can only carry out single beam scanning, and it is small in size, and section is low, is conducive to plane Integration Design.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of The description present invention and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with spy Fixed orientation construction and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more, Unless otherwise specifically defined.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office What can be combined in any suitable manner in one or more embodiment or examples.In addition, those skilled in the art can say this Different embodiments or examples described in bright book are engaged and are combined.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention Protection scope.

Claims (9)

1. a kind of two-band frequency scan antenna characterized by comprising medium substrate (1), two feed structures (2), two Mode transition structure (3) and irradiation structure (4), wherein
One feed structure (2), the mode transition structure (3), the irradiation structure (4), another feedback Electric structure (2) and another described mode transition structure (3) are set in turn on the medium substrate (1) and mutually electrically connect Logical, two mode transition structures (3) are symmetrical arranged along the first center line (11) of the medium substrate (1), described in two Feed structure (2) is symmetrical arranged along the first center line (11) of the medium substrate (1).
2. two-band frequency scan antenna according to claim 1, which is characterized in that the irradiation structure (4) include etc. From excimer transmission line (41) and if dry plate radiation patch (42), the phasmon transmission line (41) if with described in dry plate radiate patch Piece (42) is all set on the medium substrate (1), wherein
The center line of the phasmon transmission line (41) is overlapped with the second center line (12) of the medium substrate (1), described The both ends of phasmon transmission line (41) are connected to two mode transition structures (3), the radiation patch of 1/2 quantity The radiation patch (42) of piece (42) and remaining 1/2 quantity is respectively arranged at the second center line of the medium substrate (1) (12) two sides, and the first pre-determined distance is provided between each radiation patch (42) and phasmon transmission line (41) Gap, the distance for being located at two neighboring radiation patch (42) center in the same side is the second pre-determined distance, positioned at being given an account of The horizontal distance at two neighboring radiation patch (42) center of the second center line (12) two sides of matter substrate (1) is second Pre-determined distance.
3. two-band frequency scan antenna according to claim 2, which is characterized in that the radiation patch (42) is circle Shape, ellipse, rectangular or square.
4. two-band frequency scan antenna according to claim 2, which is characterized in that the phasmon transmission line (41) First metal including the first metal band (411), in the second center line (12) side for being located at the medium substrate (1) On band (411) every third pre-determined distance be arranged first groove (412), be located at the medium substrate (1) second First groove is also provided with every third pre-determined distance on first metal band (411) of the other side of center line (12) (412), all first grooves (412) is equal in magnitude, and is located at second center line (12) two of the medium substrate (1) The horizontal distance at two neighboring first groove (412) center of side is third pre-determined distance.
5. two-band frequency scan antenna according to claim 4, which is characterized in that first metal band (411) Width be greater than 2 times of depth of first groove (412).
6. two-band frequency scan antenna according to claim 4, which is characterized in that mode transition structure (3) packet Include two curved metal floors (31) and graded metal conduction band (32), two curved metal floors (31) and gradual change gold Belong to conduction band (32) to be all set on the medium substrate (1), wherein
The first end of the graded metal conduction band (32) is connected to the feed structure (2), the graded metal conduction band (32) Second end is connected to the phasmon transmission line (41), the center line and the medium substrate of the graded metal conduction band (32) (1) the second center line (12) is overlapped, second center line of two curved metal floors (31) along the medium substrate (1) (12) be symmetrical arranged, the width of the curved metal floor (31) along the curved metal floor (31) first end to second end It is gradually decrease to zero.
7. two-band frequency scan antenna according to claim 6, which is characterized in that graded metal conduction band (32) packet The second metal band (321) are included, second metal strip in the second center line (12) side for being located at the medium substrate (1) One the second groove (322) is set every third pre-determined distance on band (321), in being located at the second of the medium substrate (1) Second groove is also provided with every third pre-determined distance on second metal band (321) of the other side of heart line (12) (322), and it is located in two neighboring second groove (322) of the second center line (12) two sides of the medium substrate (1) The horizontal distance of the heart is third pre-determined distance, the depth of second groove (322) along second metal band (321) the Two ends to first end is gradually increased, until the depth of second groove (322) is equal to the depth of first groove (412).
8. two-band frequency scan antenna according to claim 6, which is characterized in that the feed structure (2) includes two A metal floor (21) and central metal conduction band (22), two metal floors (21) and the central metal conduction band (22) are equal It is set on the medium substrate (1), wherein
The central metal conduction band (22) is connected to the second end of the graded metal conduction band (32), the central metal conduction band (22) center line is overlapped with the second center line (12) of the medium substrate (1), and two metal floors (21) are along described The second center line (12) of medium substrate (1) is symmetrical arranged, and each metal floor (21) and central metal conduction band (22) are equal It is provided with the gap of the 4th pre-determined distance.
9. two-band frequency scan antenna according to claim 8, which is characterized in that the metal floor (21) and described The equal length of central metal conduction band (22).
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CN111224235A (en) * 2020-01-09 2020-06-02 上海交通大学 Low-profile vertical polarization omnidirectional/beam scanning antenna based on SSPPs
CN112072251A (en) * 2020-08-27 2020-12-11 中电科仪器仪表有限公司 Terahertz waveguide-microstrip conversion device based on waveguide narrow-wall stepped microstrip probe

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111224235A (en) * 2020-01-09 2020-06-02 上海交通大学 Low-profile vertical polarization omnidirectional/beam scanning antenna based on SSPPs
CN112072251A (en) * 2020-08-27 2020-12-11 中电科仪器仪表有限公司 Terahertz waveguide-microstrip conversion device based on waveguide narrow-wall stepped microstrip probe

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